How to build a 3D spiral (not a helix)?
Here is a tutorial for this:
https://youtu.be/-ckk8GVGv6o
Basically you use the shrinkwrap and the screw modifier to do this.

build a circle
use modifier screw and apply it
build a cone and scale and move it as you need it in the screwed circle
now use modifier shrinkwrap with object cone on your circle
scale z value to 0 so that you have &quot;flat&quot; screw